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  <div class="section" id="cmp0084">
<span id="policy:CMP0084"></span><h1>CMP0084<a class="headerlink" href="#cmp0084" title="Permalink to this headline">¶</a></h1>
<p>The <span class="target" id="index-0-module:FindQt"></span><a class="reference internal" href="../module/FindQt.html#module:FindQt" title="FindQt"><code class="xref cmake cmake-module docutils literal notranslate"><span class="pre">FindQt</span></code></a> module does not exist for <span class="target" id="index-0-command:find_package"></span><a class="reference internal" href="../command/find_package.html#command:find_package" title="find_package"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">find_package()</span></code></a>.</p>
<p>The existence of <span class="target" id="index-1-module:FindQt"></span><a class="reference internal" href="../module/FindQt.html#module:FindQt" title="FindQt"><code class="xref cmake cmake-module docutils literal notranslate"><span class="pre">FindQt</span></code></a> means that for Qt upstream to provide
package config files that can be found by <code class="docutils literal notranslate"><span class="pre">find_package(Qt)</span></code>, the consuming
project has to explicitly specify <code class="docutils literal notranslate"><span class="pre">find_package(Qt</span> <span class="pre">CONFIG)</span></code>. Removing this
module gives Qt a path forward for exporting its own config files which can
easily be found by consuming projects.</p>
<p>This policy pretends that CMake’s internal <span class="target" id="index-2-module:FindQt"></span><a class="reference internal" href="../module/FindQt.html#module:FindQt" title="FindQt"><code class="xref cmake cmake-module docutils literal notranslate"><span class="pre">FindQt</span></code></a> module does not
exist for <span class="target" id="index-1-command:find_package"></span><a class="reference internal" href="../command/find_package.html#command:find_package" title="find_package"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">find_package()</span></code></a>. If a project really wants to use Qt 3 or 4,
it can call <code class="docutils literal notranslate"><span class="pre">find_package(Qt[34])</span></code>, <code class="docutils literal notranslate"><span class="pre">include(FindQt)</span></code>, or add
<span class="target" id="index-3-module:FindQt"></span><a class="reference internal" href="../module/FindQt.html#module:FindQt" title="FindQt"><code class="xref cmake cmake-module docutils literal notranslate"><span class="pre">FindQt</span></code></a> to their <span class="target" id="index-0-variable:CMAKE_MODULE_PATH"></span><a class="reference internal" href="../variable/CMAKE_MODULE_PATH.html#variable:CMAKE_MODULE_PATH" title="CMAKE_MODULE_PATH"><code class="xref cmake cmake-variable docutils literal notranslate"><span class="pre">CMAKE_MODULE_PATH</span></code></a>.</p>
<p>The <code class="docutils literal notranslate"><span class="pre">OLD</span></code> behavior of this policy is for <span class="target" id="index-4-module:FindQt"></span><a class="reference internal" href="../module/FindQt.html#module:FindQt" title="FindQt"><code class="xref cmake cmake-module docutils literal notranslate"><span class="pre">FindQt</span></code></a> to exist for
<span class="target" id="index-2-command:find_package"></span><a class="reference internal" href="../command/find_package.html#command:find_package" title="find_package"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">find_package()</span></code></a>. The <code class="docutils literal notranslate"><span class="pre">NEW</span></code> behavior is to pretend that it doesn’t
exist for <span class="target" id="index-3-command:find_package"></span><a class="reference internal" href="../command/find_package.html#command:find_package" title="find_package"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">find_package()</span></code></a>.</p>
<p>This policy was introduced in CMake version 3.14.  CMake version
3.16.5 warns when the policy is not set and uses <code class="docutils literal notranslate"><span class="pre">OLD</span></code> behavior.
Use the <span class="target" id="index-0-command:cmake_policy"></span><a class="reference internal" href="../command/cmake_policy.html#command:cmake_policy" title="cmake_policy"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">cmake_policy()</span></code></a> command to set it to <code class="docutils literal notranslate"><span class="pre">OLD</span></code> or <code class="docutils literal notranslate"><span class="pre">NEW</span></code>
explicitly.</p>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>The <code class="docutils literal notranslate"><span class="pre">OLD</span></code> behavior of a policy is
<span class="target" id="index-0-manual:cmake-policies(7)"></span><a class="reference internal" href="../manual/cmake-policies.7.html#manual:cmake-policies(7)" title="cmake-policies(7)"><code class="xref cmake cmake-manual docutils literal notranslate"><span class="pre">deprecated</span> <span class="pre">by</span> <span class="pre">definition</span></code></a>
and may be removed in a future version of CMake.</p>
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